Santa Clara County, California
Gutter cleaning, repair and new gutters in Los Altos, CA
Los Altos gets about 13 inches of rain in a normal year, and on about 2 days a year an inch or more falls in a single day. The wettest season is winter (December to February), with about 7.9 inches; the driest is summer (June to August), with 0.1. That is about 8,300 gallons a year off each 1,000 square feet of roof, every drop of it through a gutter and a downspout.
Call (866) 228-6229 free call to a gutter contractor serving Los AltosLos Altos: rain and roofs
NOAA station USW00023244, 4 miBars to one scale; the longest is winter (December to February).
Counting days with an inch of rain or more, Los Altos sits among the fewest heavy-rain days of the 939 places in California on this site (1.8 a year). Its housing ranks 169th oldest by median year built of the 938 places in California on this site (half built by 1964).
When to clean gutters in Los Altos
Frost is rare in Los Altos, and in many years there is none (NOAA normals). With no hard freeze to strip the trees, the fall cleaning follows the leaf drop itself; book it once the trees over the roof are bare, and plan a second visit in spring.
When to clean gutters explains how the trees over a roof change the schedule.
Gutter and downspout size for Los Altos rain
The short, hard downpour is what a gutter is sized for. In Los Altos the five-minute rain expected about once in ten years falls at 2.74 inches an hour (NOAA Atlas 14 Volume 6). At that rate one 2-by-3-inch downspout drains about 2,630 square feet of roof and one 3-by-4-inch downspout about 5,260, by the rule in the Copper Development Association’s design handbook. Try your own roof in the gutter and downspout calculator, which starts from this figure.
Los Altos is dry by national standards, about 13 inches in a normal year, but much of the rain that does come can arrive in short, hard storms: the five-minute downpour expected once in ten years still runs at 2.74 inches an hour. Where gutters are used here, the job is moving that burst away from the foundation, and keeping a dry season’s dust and debris from blocking the first storm.
The houses in Los Altos
Half the homes in Los Altos were built by 1964, 74% before 1980 (ACS 2020–2024). Houses that age have often had their gutters replaced once already; if not, the original runs and the boards behind them deserve a close look. On a house built before 1978, replacing more than 20 square feet of painted fascia or trim falls under the EPA’s lead-safe rule, so ask whether the crew is certified.
81% of households own their home, and 81% of homes are detached houses, 5% townhouses. In a townhouse or HOA community, check who owns the gutters and what colors are allowed before booking.
Hiring in California
Ask any contractor working in Los Altos what California requires of them for gutter work, and to show proof of insurance. Hiring a gutter contractor
In California’s fire hazard severity zones, the 2025 Wildland-Urban Interface Code (in force January 1, 2026) requires gutters and downspouts of noncombustible material, and gutters fitted with an approved means to keep leaves and debris from collecting (section 504.4). (2025 California Wildland-Urban Interface Code, Chapter 5 (UpCodes))
Gutter work in Los Altos
With half the homes built by 1964, replacement gutters and the fascia behind them come up more often here than in newer suburbs. The line takes all of it: